It is a bit of hike-a-bike from JMP. You need to take the tunnel under 13 from Palos Colorados, then make a right and ride on the sidewalk about a block. There are some cool staircases to the creek bridge, but then you need to hike up about 1/4 mile of stairs.

The roll down to Bridgewater Trail past the golf course is easy but I find it exhilarating after climbing for so long. I make a hard right down the switchbacks, then cross the creek to ride Old Canon Trail.

I would not ride Dimond Canyon Trail. I tried last night, you are hiking thru deadfall and over massive ledges and loose boulders for the first 2 miles.

I have only ridden it at night, and there is definitely a "The Warriors" feel to the whole place, with all the graffiti and the street noise from Park Blvd.

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Summary:In response to some of the reviews below, the trail is perfectly legal - it was built by mountain bikers. It suffers from fallen trees from time to time, but hey, it happens. Consider packing a light foldable saw if you ride in Oakland in the winter - we get a lot of that. Visit www.btceb.org to help out with trail maintenance.

Recommended Route:Enter from the main canyon entrance on El Centro and you will need to look very carefully for where to cross the creek about a mile in - the bridge was never built, though the City would like to see it done. Alternatively, you can ride up El Centro one block toward Park and turn right. Enter the singletrack at the end of the cul de sac and follow through the Canyon. When you get to the top of the Canyon after crossing the stream, make a U-turn onto the short fire road section and continue, descending when you reach the stairs. Turn right on Mountain Blvd. when you get there and follow the directions below up to JMP.

Other recommended trails in the same area:Dimond Canyon is a short ride, but link it up with Joaquin Miller Park - you just need to ride up Mountain Blvd. and then up Joaquin Miller Road. You can ride for over 15 miles on singletrack. Please respect the rules in this last bastion of legal singletrack in the 510.

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Review DateMarch 13, 2002

Overall Rating 1 of 5

Ridden Trail:Ridden Once

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Reviewed by: Erich T
, from Oakland, CA

Summary:Maybe once this trail was passable. I started at the park and rode up the creek on teh woodchip path until I got to the flood control waterfall. The left side of the creek is undergoing a native plant restoration and is totaly off limits. The right side is blocked by a large bushy tree that fell from the canyon rim out of somebody's backyard. I didn't exactly feel like tunneling through there so I gave up and went home. What a bust!

Other recommended trails in the same area:I just moved here.

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Review DateOctober 4, 2001

Overall Rating 5 of 5

Ridden Trail:Once a week

Visitors rate this review5.00 of 5,
1.00 votes

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Reviewed by: Todd Bozicevich
, from Alameda, ca

Summary:Cool little trail where yo ride along a canyon edge for some of it so hang tight to the inside. Try not to run over any gopher snakes that live in the canyon. Beware of erosion some extremely ill informed individuals that like to plant daisy's decided they should cut out alot of the oak trees that need to be anchored right where they are. Hopefully they wised up and realized that alot of the trees they wanted to cut down were extremely critical for purposes of erosion control.

Recommended Route:Not alot to choose from start at the base of the park go up and cross the stream on the left side of the canyon. you go about a 1/2 mile and stay to the right and you will cross the creek again and head up some cool switchbacks. hang a left at the top of the switchbacks and go to the redwood grove. Then when you make it to the top with the redwood tree's be a man and try to ride the steps down without being tossed into the canyon. This section is really beautiful with a nice stream at the bottom. Once you cross the stream and end up on Monterey road I like to go up the road under the bridge on the left hand of the street then up left on Mountain blvd then hook up with Juaquin miller rode where you can then go into the park ride up sunset to sequoia bayview up over the top then hit redwood park go down west ridge up canyon around back to Skyline blvd then dive back into Juoquin miller down and out any route ou want. i suggest chapperrel. then out of the park via sunset and hit the road back to diamond canyon. And on back to Alameda. This is about a 39 mile loop but well worth it. This ride will make your lungs and legs as big as Armstrongs. Also instead or doing the east/west ridge trail loop swing on into Chabot park via macdonald trail for another good climb.

Other recommended trails in the same area:Redwood park is the best then Juaquin Miller then Chabot. Tilden is kind of lame compared to the others but still better than 90% of the trail in America. My rating is based on the whole big loop not just Dimond Canyon I give Dimond canyon a 3

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Review DateDecember 18, 2000

Overall Rating 3 of 5

Ridden Trail:Every few months

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Reviewed by: Bad A** Single Speeder
, from Roseville, CA

Summary:Intermediate level though the switchbacks and cement staircases will test an advanced rider. Give it three stars since it is short, not signed well, and well you can tell you are near a city.

Recommended Route:Park in Dimond Park (take Hwy 13 toward Hayward, exit Park and head south, left on Wellington, at end of street). Head up the creek past the pool. When you cross the road you will see trail map (it is outdated). Go up fireroad for about 1/2 mile. Cross creek when you see singletrack. Follow it up through a couple of switchbacks. Bear right when it forks. Go under bridge and when it forks again bear right. As it heads down toward the creek, it will fork again. Take a sharp right. You will cross the creek and go up through a series of well-made switchbacks. Take a left on the fireroad. Follow it around the edge of the driving range for a 1/2 mile. When you hit the forested area ride down the cement staircase if you can to the bottom. Cross the creek and head up to Monterey. That's it!